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- Title
Effect of premolar extractions on vertical dimension in borderline extraction case - A retrospective study.
- Authors
Sridharan, Swetha; Kumar, S. Aravind
- Abstract
Aim: Aim of this study is to investigate the short-term effects of systematic premolar extraction in borderline cases for extraction therapy on vertical dimension. Materials and Methods: Inclusion criteria: Overjet of 6-9 mm and crowding of >6 mm 50 had first premolars extracted, 50 were non-extraction patients. Patient selection by multivariate cluster analysis ensured homogeneity at baseline regarding dentoskeletal parameters. Parameter changes were determined with the models and compared between the extraction and non-extraction group. Results: The systematic extraction of premolars in borderline patients with a distinct sagittal overjet and crowding did not significantly influence vertical dimension. Discussion: We found that the vertical overbite increased slightly in the extraction patients while decreasing in the non-extraction patients. This group difference was also reported by Kinzinger et al. but could not be statistically validated in our study. Most studies on the contrary report a significant decrease of vertical overbite after premolar extraction. In most of these cases, however, the patients had an increased overbite at the beginning of treatment. Conclusions: The influence of premolar extractions on vertical dimension is often overestimated, since only slight changes in are to be expected. In integrated treatment planning, the extraction decision should not be primarily based on concerns about the aggravation of vertical dimension.
- Subjects
ORTHODONTICS; DENTAL extraction; MALOCCLUSION; MEDICAL care; DENTAL care
- Publication
Drug Invention Today, 2019, Vol 11, Issue 2, p369
- ISSN
0975-7619
- Publication type
Article